Double Bladed Laser
Pause the game, then press the following combination of buttons: O, Square, O, Square, Up, Down, Left, Left.
100% success rate. 

Sly 2 Demo
At the title screen, hold L1 + L2 + R1 + R2 for a demo for Sly 2: Band of Theives.
100% success rate. 

Unlock Dan
Go to the "Edit Profile" screen, then hold L2 and press the following combination of buttons: Left, Left, Left, Left, Up, Right, Up, Left.
0% success rate. 

Unlock Nefarious
Go to the "Edit Profile" screen, then hold L2 and press the following combination of buttons: Up, Up, Up, Left, Right, Up, Left, Up.
0% success rate. 

Squat Counter
Highlight the "Stats" option at the main menu, then press the following combination of buttons: Up, Down, Left, Right, Square.
0% success rate. 

Unlock Sketchbook
Complete the game to unlock the 'Sketchbook' in the 'Cinematics' menu.
0% success rate. 

Unlock Bomberman Mini-Game
At Star Phoenix's comic room select chapter and press Square. Input YING_TZU and press start. This will enter the Insomniac Museum where there is a Bomberman type mini-game
Submitted by lizzie007. 0% success rate. 

Go to: Ratchet and Clank 3: Up Your Arsenal Info Page | nGaming Home Page.